WO2019046984A1 - Sistema de medición en línea de desgaste de revestimientos y tensión de pernos de molino mediante sensor ecográfico inserto en el extremo rosco de los pernos - Google Patents
Sistema de medición en línea de desgaste de revestimientos y tensión de pernos de molino mediante sensor ecográfico inserto en el extremo rosco de los pernos Download PDFInfo
- Publication number
- WO2019046984A1 WO2019046984A1 PCT/CL2018/050083 CL2018050083W WO2019046984A1 WO 2019046984 A1 WO2019046984 A1 WO 2019046984A1 CL 2018050083 W CL2018050083 W CL 2018050083W WO 2019046984 A1 WO2019046984 A1 WO 2019046984A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mill
- bolts
- threaded end
- tension
- wear
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/1805—Monitoring devices for tumbling mills
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/25—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons
- G01L1/255—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons using acoustic waves, or acoustic emission
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
- G01L5/246—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed using acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/22—Lining for containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2210/00—Codes relating to different types of disintegrating devices
- B02C2210/01—Indication of wear on beaters, knives, rollers, anvils, linings and the like
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/025—Change of phase or condition
- G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02827—Elastic parameters, strength or force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0421—Longitudinal waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/101—Number of transducers one transducer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/102—Number of transducers one emitter, one receiver
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
Definitions
- Mining mills are mechanical devices that are used in a stage of mineral processing called “grinding” and that consists in decreasing the size of the mineral that enters the mill that is continuously rotating until obtaining dry particles or pulp of mineral of adequate size for the next processes in the processing chain.
- the mills are covered by an internal casing resistant to mechanical abrasion and which is composed of smaller and manipulable replaceable elements that are usually made of steel and sometimes also contain rubber elements.
- the elements of the inner casing are fastened to the outer casing or body of the mill by bolts specially designed for this purpose and inserted into holes in the casing elements and whose thread and nut are outside the body of the mill.
- the mill bolts are manufactured from selected steels and then subjected to heat treatments that ensure that the bolt supports the mechanical requirement to which it is subjected as a mechanical fastening element, however the end of the bolt that faces the inside of the mill must withstand wear as well as the coating it supports so that usually an element called "block” is installed which extends the bolt and which in turn is designed to withstand abrasion (see figure 2).
- block an element which extends the bolt and which in turn is designed to withstand abrasion (see figure 2).
- ball mills in which a set of steel balls perform the action of grinding the ore and also in mills that are generally larger in diameter and capacity in which the grinding process occurs by the action of balls per also by the action of the mineral itself, so that they perform a semi-autogenous milling, which is why they are called SAG mills.
- the measurement of the state of wear of the casing is a useful fact to make the decision about when the mill will stop to make the coating change. It is also interesting to have information about the tightening of the bolts because the bolt tightening state allows to diagnose the general state of the mill and predict failures. Regarding these issues, wear and stability of the mill shells, there are many theories and operational recipes, however, reliable information is lacking while the mills are operating. In reality, only information from subsequent examinations is available, as there are no sensors that are sufficiently precise and of reasonable cost to implement the operation of the mills.
- the invention consists in installing, at the threaded end of the bolts that support the coating or inner casing of industrial mills, an ultrasound instrument with the ability to directly measure and transmit in line, the length of the bolts and thereby estimate the state of wear of the inner lining and the tightening tension of the bolts (see figure 1).
- an ultrasound instrument with the ability to directly measure and transmit in line, the length of the bolts and thereby estimate the state of wear of the inner lining and the tightening tension of the bolts (see figure 1).
- the tension to which the pin is subjected is a variable that evolves from the tension imposed by the initial tightening (see figure 4) and that tends to fall progressively depending on the different events that occur in its useful life, in particular of traumatic or high-energy events.
- the idea is to incorporate an ultrasound device into the threaded end of the pin.
- the ultrasound device emits acoustic wave trains towards the inside of the pin and as a result of wave phenomena such as reflection, refraction, interference and others, it is possible to obtain an echographic or echo spectrum that is interpretable and from which the tension of tightening can be estimated. of the bolt, the length of the bolt and the wear of the inner lining of the mill (see figure 1 and figure 3)
- the ultrasonic device to be incorporated needs to emit acoustic signals towards the interior of the instrumented bolt, so that there is an energy expenditure associated with the emission of acoustic signals that must be supplied by some source.
- the period between changes of coatings and mill bolts depends on their level of exploitation, however it is known that the period in question is of the order of months, typically the change of coating and bolts of SAG mills is made twice a year and the change of coating and bolts of ball mills is made once a year.
- the emission of pulses is of a limited number, it is possible to use commercial batteries.
- the information generated by (i) the ultrasonic devices installed on the bolts that are installed and rotating with the mill must be transmitted to a (ii) communication manager device with storage capacity and transmission of information that must be installed in a fixed position and at a prudent distance so that the communication with the ecographs installed in the bolts of the mill is feasible.
- This device must include a high-level communication system, either through a local plant network or other wireless communication system to communicate with (iii) a data analysis and deployment system that may be in a remote location .
- the device for measuring wear and tension of mill bolts is composed of the following elements:
- Acoustic wave emitter or speaker which is a device capable of emitting acoustic waves towards the inside of the pin.
- Acoustic wave receiver or microphone which is a device capable of detecting acoustic signals from the pin.
- Electronic circuit equipped with an amplification system that provides the necessary power to emit acoustic signals towards the interior of the bolt using the speaker and in turn is capable of translating acoustic signals into electronic signals that the microphone takes from the inside of the bolt.
- Galvanic battery which is a power source with capacity to supply energy to the ultrasound during the operation time of the pin in the mill.
- a radiofrequency communication system composed of a transponder (with the ability to coordinate broadcast and reception of communications) and an antenna that is capable of transmitting the information of wear and / or tension of the pin in every occasion in which it is required.
- FIGURE 1 Components installed in an orifice executed in the threaded end of the instrumented bolt: (E) emitter, (R) receiver, (uC) electronic microcontroller, (- +) galvanic battery and ( ⁇ ) transmission system.
- FIGURE 2 View of typical mill bolt. The zone of traction is observed (1), (2) the zone of elongation and (3) the block of the pin.
- FIGURE 3 (1) The external appearance of the bolt. Inside the pin (2) the emitter generates train of pulses, (3) the signal is refracted and reflected and in the interfaces and the refracted wave train generates an interpretable spectrum and the receiver receives the spectrum.
- FIGURE 4 The tension and wear of a bolt are variables that are measured with the same device, however, the variation of both is perfectly distinguishable one from the other as the wear occurs slowly while the bolt life and the bolt life elapses.
- Bolt tension on the other hand, varies from its initial value, reduced by traumatic or high-energy events that occur during the bolt's useful life.
- FIGURE 5 The bolt tension is approximately proportional to a
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Toxicology (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112020004582-9A BR112020004582A2 (pt) | 2017-09-07 | 2018-09-06 | sistema para a medição em linha de desgaste do revestimento do laminador e tensão do parafuso do laminador. |
PE2020000323A PE20210604A1 (es) | 2017-09-07 | 2018-09-06 | Sistema de medicion en linea de desgaste de revestimientos y tension de pernos de molino mediante sensor ecografico inserto en el extremo rosco de los pernos |
MX2020002617A MX2020002617A (es) | 2017-09-07 | 2018-09-06 | Sistema de medicion en linea de desgaste de revestimientos y tension de pernos de molino mediante sensor ecografico inserto en el extremo rosco de los pernos. |
CA3075171A CA3075171A1 (en) | 2017-09-07 | 2018-09-06 | System for in-line measurement of mill liner wear and mill bolt tension by means of an echographic sensor inserted into the threaded end of bolts |
AU2018329974A AU2018329974B2 (en) | 2017-09-07 | 2018-09-06 | System for in-line measurement of mill liner wear and mill bolt tension by means of an echographic sensor inserted into the threaded end of bolts |
ES18854718T ES2942582T3 (es) | 2017-09-07 | 2018-09-06 | Sistema de medición en línea de desgaste de revestimientos de molino y tensión de pernos de molino mediante sensor ecográfico inserto en el extremo rosco de los pernos |
EP18854718.6A EP3680018B1 (en) | 2017-09-07 | 2018-09-06 | System for in-line measurement of mill liner wear and mill bolt tension by means of an echographic sensor inserted into the threaded end of bolts |
US16/645,283 US20200209128A1 (en) | 2017-09-07 | 2018-09-06 | System for in-line measurement of mill liner wear and mill bolt tension by means of an echographic sensor inserted into the threaded end of bolts |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CL2260-2017 | 2017-09-07 | ||
CL2017002260A CL2017002260A1 (es) | 2017-09-07 | 2017-09-07 | Sistema de medición en línea de desgaste de revestimientos y tensión de pernos de molino mediante sensor ecográfico inserto en el extremo rosco de los pernos. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019046984A1 true WO2019046984A1 (es) | 2019-03-14 |
Family
ID=61597959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CL2018/050083 WO2019046984A1 (es) | 2017-09-07 | 2018-09-06 | Sistema de medición en línea de desgaste de revestimientos y tensión de pernos de molino mediante sensor ecográfico inserto en el extremo rosco de los pernos |
Country Status (10)
Country | Link |
---|---|
US (1) | US20200209128A1 (es) |
EP (1) | EP3680018B1 (es) |
AU (1) | AU2018329974B2 (es) |
BR (1) | BR112020004582A2 (es) |
CA (1) | CA3075171A1 (es) |
CL (1) | CL2017002260A1 (es) |
ES (1) | ES2942582T3 (es) |
MX (1) | MX2020002617A (es) |
PE (1) | PE20210604A1 (es) |
WO (1) | WO2019046984A1 (es) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022000072A1 (en) * | 2020-07-03 | 2022-01-06 | National Research Council Of Canada | Monitoring liner wear in industrial mills |
US11782029B2 (en) | 2018-12-26 | 2023-10-10 | Viwek Vaidya | Device and system for monitoring wear of a wearable component mounted in mining equipment |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210237094A1 (en) * | 2018-04-26 | 2021-08-05 | Moly-Cop USA LLC | Grinding media, system and method for optimising comminution circuit |
CN111623701A (zh) * | 2020-04-27 | 2020-09-04 | 洛阳矿山机械工程设计研究院有限责任公司 | 一种球磨机衬板底板磨损在线检测方法 |
MX2023005939A (es) * | 2020-11-18 | 2023-05-29 | Moly Cop Usa Llc | Aparatos, sistemas y metodos para detectar y modelar comportamiento de carga de molino. |
EP4247562B1 (en) * | 2020-11-20 | 2024-06-12 | Basf Se | Jet mill |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2004200377C1 (en) * | 2003-01-31 | 2010-06-24 | Ffe Minerals Corporation | A system to determine and analyze the dynamic internal load in revolving mills, for mineral grinding |
WO2013116954A1 (es) * | 2012-02-07 | 2013-08-15 | Industrial Support Company Ltda | Perno sensor electrónico de desgaste en linea, que tiene dispositivo con transductor y pieza antivibraciones con cpu, material antiestático y transmisor rf |
CA2890971A1 (en) * | 2015-05-12 | 2016-11-12 | Scanimetrics Inc. | Containment integrity sensor device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2539048A1 (en) * | 2006-03-09 | 2007-09-09 | Dennis Slater | System for measuring wear in a grinding mill |
US9476689B2 (en) * | 2014-06-13 | 2016-10-25 | Dash Llc | Wear indication devices, and related assemblies and methods |
-
2017
- 2017-09-07 CL CL2017002260A patent/CL2017002260A1/es unknown
-
2018
- 2018-09-06 BR BR112020004582-9A patent/BR112020004582A2/pt not_active IP Right Cessation
- 2018-09-06 ES ES18854718T patent/ES2942582T3/es active Active
- 2018-09-06 MX MX2020002617A patent/MX2020002617A/es unknown
- 2018-09-06 AU AU2018329974A patent/AU2018329974B2/en active Active
- 2018-09-06 WO PCT/CL2018/050083 patent/WO2019046984A1/es unknown
- 2018-09-06 CA CA3075171A patent/CA3075171A1/en active Pending
- 2018-09-06 PE PE2020000323A patent/PE20210604A1/es unknown
- 2018-09-06 US US16/645,283 patent/US20200209128A1/en not_active Abandoned
- 2018-09-06 EP EP18854718.6A patent/EP3680018B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2004200377C1 (en) * | 2003-01-31 | 2010-06-24 | Ffe Minerals Corporation | A system to determine and analyze the dynamic internal load in revolving mills, for mineral grinding |
WO2013116954A1 (es) * | 2012-02-07 | 2013-08-15 | Industrial Support Company Ltda | Perno sensor electrónico de desgaste en linea, que tiene dispositivo con transductor y pieza antivibraciones con cpu, material antiestático y transmisor rf |
CA2890971A1 (en) * | 2015-05-12 | 2016-11-12 | Scanimetrics Inc. | Containment integrity sensor device |
Non-Patent Citations (1)
Title |
---|
See also references of EP3680018A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11782029B2 (en) | 2018-12-26 | 2023-10-10 | Viwek Vaidya | Device and system for monitoring wear of a wearable component mounted in mining equipment |
WO2022000072A1 (en) * | 2020-07-03 | 2022-01-06 | National Research Council Of Canada | Monitoring liner wear in industrial mills |
Also Published As
Publication number | Publication date |
---|---|
CL2017002260A1 (es) | 2018-02-23 |
EP3680018A4 (en) | 2021-06-09 |
MX2020002617A (es) | 2021-03-29 |
EP3680018A1 (en) | 2020-07-15 |
ES2942582T3 (es) | 2023-06-02 |
AU2018329974B2 (en) | 2024-02-22 |
US20200209128A1 (en) | 2020-07-02 |
CA3075171A1 (en) | 2019-03-14 |
EP3680018B1 (en) | 2023-01-04 |
AU2018329974A1 (en) | 2020-04-23 |
BR112020004582A2 (pt) | 2021-03-23 |
PE20210604A1 (es) | 2021-03-23 |
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